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Enabling automated updates

Once in a while (or more often) you need to update your application that’s running in a cloud-native fashion inside Kubernetes.

Let’s see how easy it is to do it with Keel.

Install Keel

Installing Keel is the first step, as long as no update policies are defined in your application deployment files or Helm Charts, Keel will ignore them.You can choose your preferred installation type (kubectl or Helm) to deploy Keel, more details are available here.

keel.sh/policy: major specifies that all - major, minor and patch versions should trigger application update.

keel.sh/trigger: poll informs Keel to create an active watcher for the repository that’s specified in the deployment file. For private repositories Keel will use existing secrets that Kubernetes uses to pull the image so no additional configuration required. Polling trigger is useful when webhooks or GCR pubsub is not availabe. If you have PUBSUB enabled for your cluster, then you shouldn’t use polling trigger.